Sampling needle swab, cleaning assembly and analyzer

Abstract

The utility model discloses a sampling needle swab, a cleaning assembly and an analyzer. In the sampling needle swab provided by the invention, the joint of a liquid inlet pipe and a first annular cavity, the joint of the first annular cavity and a cavity body and the circle center of the first annular cavity are not on the same straight line; according to the sampling needle swab, it is ensured that cleaning liquid uniformly enters the cavity from the first annular cavity to clean the sampling needle, the situation that the cleaning liquid only enters the cavity from one position and cannot make uniform contact with the sampling needle, and cleaning of the sampling needle is incomplete is avoided, and the cleaning efficiency of the sampling needle swab on the sampling needle is improved. Meanwhile, the connecting position of the liquid outlet pipe and the second annular cavity, the connecting position of the second annular cavity and the cavity and the circle center of the second annular cavity are not located on the same straight line, pressure in the second annular cavity is evenly distributed, the cleaning liquid can be evenly sucked out of the second annular cavity, and the discharging efficiency of the cleaning liquid in the cavity is guaranteed; the cleaning efficiency of the sampling needle swab on the sampling needle is further improved.

Description

Technical Field

[0001] The present application relates to the technical field of sampling needle cleaning, and in particular to a sampling needle swab, a cleaning component and an analyzer. Background Art

[0002] When the analyzer is testing a sample, the sampling needle needs to sample the sample and transport the sample to the testing area for sample testing. During this process, the area where the sampling needle contacts the sample liquid will adhere to the sample liquid. If the analyzer needs to test different types of sample liquids, if the sampling needle is not cleaned in time after sampling the previous type of sample liquid, and the next type of sample liquid is sampled, the sample liquid of the previous type attached to the sampling needle will contaminate the next type of sample liquid, affecting the test results of the next type of sample liquid.

[0003] Therefore, after sampling the sample, the sampling needle needs to be cleaned. At present, running water is generally used to take away the sample liquid attached to the outer wall of the sampling needle. However, the sample liquid has strong adhesion, and the running water cannot clean the sample liquid, resulting in poor cleaning effect of the sampling needle. Utility Model Content

[0004] In order to solve the above problems, the present application provides a sampling needle swab, which is used to clean the sampling needle. The sampling needle swab includes:

[0005] A main body, provided with a cavity, a first annular cavity and a second annular cavity, wherein the cavity is arranged to penetrate along the axial direction of the main body to allow the sampling needle to pass through the cavity, the first annular cavity and the second annular cavity are arranged around the cavity, and the first annular cavity and the second annular cavity are both connected to the cavity;

[0006] A liquid inlet pipe and a liquid outlet pipe are both arranged on the main body, and the liquid inlet pipe and the liquid outlet pipe are located on the same height section of the main body; the liquid inlet pipe is connected with the cavity through the first annular cavity, and the liquid outlet pipe is connected with the cavity through the second annular cavity;

[0007] Wherein, the connection between the liquid inlet pipe and the first annular cavity, the connection between the first annular cavity and the cavity body and the center of the first annular cavity are not on the same straight line;

[0008] The connection point between the liquid outlet pipe and the second annular cavity, the connection point between the second annular cavity and the cavity body, and the center of the second annular cavity are not on the same straight line.

[0009] Wherein, the first annular cavity is arranged concentrically with the second annular cavity, and the first annular cavity is arranged concentrically with the cavity body;

[0010] In the height direction of the main body, the liquid inlet pipe is located above the first annular cavity;

[0011] The second annular cavity and the liquid outlet pipe are located on the same height section of the main body.

[0012] Wherein, the diameter of the liquid inlet pipe is smaller than the diameter of the liquid outlet pipe.

[0013] Wherein, the main body further includes at least one first through hole and at least one second through hole, the first annular cavity is connected to the cavity through the first through hole, and the second annular cavity is connected to the cavity through the second through hole.

[0014] Wherein, the first through hole is located at the upper edge of the first annular cavity.

[0015] Wherein, the main body comprises three first through holes and three second through holes,

[0016] The extension directions of two of the three first through holes are parallel to each other, and the hole axes of the two of the three first through holes are not in the same straight line with the center of the first annular cavity, and the extension direction of the remaining one of the three first through holes is perpendicular to the extension direction of the two of the three first through holes, and the remaining one of the three first through holes is equidistant from the two of the three first through holes;

[0017] Any two of the three second through holes are equidistantly arranged on the cavity wall of the second annular cavity close to the cavity body, and the extension direction of the second through hole is the direction in which the opening of the second through hole points to the center of the second annular cavity.

[0018] The cavity comprises a first cavity section, a second cavity section, a third cavity section and a fourth cavity section which are connected in sequence.

[0019] The first annular cavity is communicated with the fourth cavity segment, and the second annular cavity is communicated with the second cavity segment.

[0020] The diameter of the first cavity section is smaller than the diameter of the second cavity section, the diameter of the third cavity section, and the diameter of the fourth cavity section;

[0021] The diameter of the third cavity section is smaller than the diameter of the second cavity section, and the diameter of the third cavity section is smaller than the diameter of the fourth cavity section;

[0022] The diameter of the second cavity section is greater than the diameter of the fourth cavity section.

[0023] The first cavity segment and the second cavity segment, the second cavity segment and the third cavity segment, and the third cavity segment and the fourth cavity segment are transitioned by chamfers.

[0024] In order to solve the above-mentioned technical problems, the present application also provides a cleaning component, which includes the sampling needle swab as described above, a cleaning liquid supply unit and an air pump unit, the cleaning liquid supply unit is connected to the liquid inlet tube of the sampling needle swab, the air pump unit is connected to the liquid outlet tube of the sampling needle swab, the cleaning liquid supply unit supplies cleaning liquid to the cavity of the sampling needle swab through the liquid inlet tube to clean the sampling needle located in the cavity, and the air pump unit generates negative pressure at the liquid outlet tube so that the cleaning liquid after cleaning the sampling needle is discharged from the cavity through the liquid outlet tube.

[0025] In order to solve the above technical problems, the present application also provides an analyzer, including the cleaning component, sampling needle and driving component as described above, wherein the driving component is connected to the sampling needle and is used to drive the sampling needle to move into a sample tube for sampling, or to move into the sampling needle swab of the cleaning component for cleaning.

[0026] Beneficial effects of the present application: Different from the prior art, the sampling needle swab provided by the present application is used for cleaning the sampling needle. In the sampling needle swab, the cavity of the main body allows the sampling needle to pass through, and the first annular cavity and the second annular cavity are arranged around the cavity and are connected to the cavity, and then the liquid inlet pipe is connected to the cavity through the first annular cavity, and the liquid outlet pipe is connected to the cavity through the second annular cavity. The cleaning liquid can enter the cavity through the liquid inlet pipe and the first annular cavity to clean the sampling needle in the cavity, and because the first annular cavity is arranged around the cavity, the uniformity of the cleaning liquid injected into the cavity is guaranteed, ensuring that the cleaning liquid contacts the sampling needle for cleaning. Furthermore, the cleaning liquid after cleaning can be discharged through the second annular cavity and the liquid outlet to keep the sampling needle dry and improve the efficiency of cleaning the sampling needle.

[0027] Moreover, the connection between the liquid inlet tube and the first annular cavity, the connection between the first annular cavity and the cavity body, and the center of the first annular cavity are not on the same straight line, ensuring that after the liquid inlet tube injects the cleaning liquid into the first annular cavity, the cleaning liquid enters the cavity body from the first annular cavity evenly to clean the sampling needle, avoiding the situation that the cleaning liquid enters the cavity body from only one place and cannot evenly contact the sampling needle, and the cleaning of the sampling needle is incomplete, further improving the cleaning efficiency of the sampling needle swab for the sampling needle. At the same time, the connection between the liquid outlet tube and the second annular cavity, the connection between the second annular cavity and the cavity body, and the center of the second annular cavity are not on the same straight line, ensuring that when the liquid outlet tube absorbs the cleaning liquid, the pressure in the second annular cavity is evenly distributed, and the cleaning liquid can be evenly sucked out of the second annular cavity, ensuring the discharge efficiency of the cleaning liquid in the cavity, and further improving the cleaning efficiency of the sampling needle swab for the sampling needle. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0029] in:

[0030] Figure 1 It is a structural schematic diagram of the first embodiment of the sampling needle swab provided by the present application;

[0031] Figure 2 yes Figure 1 A schematic diagram of the cross-sectional structure of the sampling needle swab along the section line I-I';

[0032] Figure 3 yes Figure 1 A schematic diagram of the cross-sectional structure of the sampling needle swab along the section line II-II';

[0033] Figure 4 yes Figure 1 The sampling needle swab along Figure 2 The schematic cross-sectional structure diagram of the section line AA' shown;

[0034] Figure 5 yes Figure 1 The sampling needle swab along Figure 3 A schematic cross-sectional structure diagram of the section line BB' shown;

[0035] Figure 6 It is a schematic structural diagram of the first embodiment of the analyzer provided in this application.

[0036] Figure numbers: analyzer A; sampling needle swab 1; main body 11; cavity 111; first cavity section 1111; second cavity section 1112; third cavity section 1113; fourth cavity section 1114; first annular cavity 112; second annular cavity 113; first through hole 114; second through hole 115; liquid inlet pipe 12; liquid outlet pipe 13; sampling needle 2. DETAILED DESCRIPTION

[0037] The scheme of the embodiment of the present application is described in detail below in conjunction with the drawings of the specification.

[0038] In the following description, for the purpose of explanation rather than limitation, specific details such as specific system structures, interfaces, and technologies are provided to facilitate a thorough understanding of the present application.

[0039] Reference to "embodiments" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0040] The term "and / or" in this application is only a description of the association relationship of associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the objects associated before and after are in an "or" relationship. In addition, "many" in this article means two or more than two. In addition, the term "at least one" in this article means any combination of at least two of any one or more of a plurality of, for example, including at least one of A, B, and C, and can mean including any one or more elements selected from the set consisting of A, B, and C. In addition, the terms "first", "second", and "third" in this application are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features.

[0041] See also Figure 1 , Figure 2 and Figure 3 , Figure 1 It is a structural schematic diagram of the first embodiment of the sampling needle swab provided by the present application; Figure 2 yes Figure 1 A schematic diagram of the cross-sectional structure of the sampling needle swab along the section line I-I'; Figure 3 yes Figure 1 The sampling needle swab 1 provided in the embodiment of the present application comprises a main body 11 , a liquid inlet pipe 12 and a liquid outlet pipe 13 .

[0042] The main body 11 is provided with a cavity 111, a first annular cavity 112 and a second annular cavity 113. The cavity 111 is arranged to penetrate along the axial direction of the main body 11 to allow the sampling needle to pass through the cavity 111, and the first annular cavity 112 and the second annular cavity 113 are arranged around the cavity 111, and the first annular cavity 112 and the second annular cavity 113 are both connected to the cavity 111.

[0043] The liquid inlet pipe 12 and the liquid outlet pipe 13 are both arranged on the main body 11, and the liquid inlet pipe 12 and the liquid outlet pipe 13 are located on the same height section of the main body 11, which is convenient for processing the sampling needle swab 1. Further, the liquid inlet pipe 12 is connected to the cavity 111 through the first annular cavity 112, and the liquid outlet pipe 13 is connected to the cavity 111 through the second annular cavity 113.

[0044] In one embodiment, when the sampling needle enters the cavity 111, the cleaning liquid enters the first annular cavity 112 through the liquid inlet pipe 12. Since the first annular cavity 112 is arranged around the cavity 111, the cleaning liquid enters the cavity 111 in all directions through the first annular cavity 112 to clean the sampling needle in the cavity 111. Then, the cleaning liquid is discharged from the cavity 111 through the second annular cavity 113 and the liquid outlet pipe 13 to keep the sampling needle dry.

[0045] For further information, see Figure 4 and Figure 5 , Figure 4 yes Figure 1 The sampling needle swab along Figure 2 The schematic cross-sectional structure diagram of the section line AA' shown; Figure 5 yes Figure 1 The sampling needle swab along Figure 3 The schematic diagram of the cross-sectional structure of the section line BB' is shown. The connection between the liquid inlet tube 12 and the first annular cavity 112 (hereinafter referred to as the liquid inlet for clarity), the connection between the first annular cavity 112 and the cavity body 111 and the center of the first annular cavity 112 are not on the same straight line. That is, the liquid inlet is not directly opposite to the connection between the first annular cavity 112 and the cavity body 111, so as to prevent the cleaning liquid from entering the first annular cavity 112 from the liquid inlet tube 12 and directly entering the cavity body 111 through the connection between the first annular cavity 112 and the cavity body 111, but from entering the cavity body 111 from other positions. The cleaning liquid cannot evenly contact the sampling needle, thereby reducing the cleaning efficiency of the sampling needle.

[0046] For example, the first annular cavity 112 is connected to the cavity body 111 through a plurality of through holes. If one of the plurality of through holes is directly opposite to the liquid inlet, it is very likely that the cleaning liquid enters the first annular cavity 112 through the liquid inlet pipe 12 and directly enters the cavity body 111 through the through hole directly opposite to the liquid inlet. The cleaning liquid can only contact the area corresponding to the sampling needle and the through hole, and can only clean the area corresponding to the sampling needle and the through hole. Due to insufficient water flow, other areas of the sampling needle cannot be cleaned, and the sampling needle cannot be cleaned, thereby reducing the cleaning efficiency of the sampling needle.

[0047] In this embodiment, by arranging the connection between the liquid inlet tube 12 and the first annular cavity 112, the connection between the first annular cavity 112 and the cavity body 111, and the center of the first annular cavity 112 to be not on the same straight line, it is ensured that after the cleaning liquid enters the first annular cavity 112 through the liquid inlet tube 12, it flows in the cavity body of the first annular cavity 112, and after accumulating a certain amount of liquid, it enters the cavity body 111 in all directions through the first annular cavity 112 to clean the sampling needle, thereby ensuring that the cleaning liquid contacts the sampling needle in all directions, thereby improving the cleaning efficiency of the sampling needle.

[0048] In another embodiment, the connection between the liquid outlet pipe 13 and the second annular cavity 113 (hereinafter referred to as the liquid outlet), the connection between the second annular cavity 113 and the cavity body 111, and the center of the second annular cavity 113 may not be on the same straight line.

[0049] Furthermore, when the negative pressure at the liquid outlet pipe 13 absorbs the cleaning liquid in the cavity 111, the negative pressure can be evenly distributed in the second annular cavity 113. The cleaning liquid after cleaning the sampling needle in the cavity 111 can enter the second annular cavity 113 from multiple directions, and then be discharged through the liquid outlet pipe 13, thereby improving the discharge efficiency of the cleaning liquid of the sampling needle swab 1 and improving the cleaning efficiency of the sampling needle.

[0050] If the liquid outlet is directly opposite to the connection between the second annular cavity 113 and the cavity 111, for example, the second annular cavity 113 is connected to the cavity 111 through multiple through holes, and one of the multiple through holes is directly opposite to the liquid outlet, then because the through hole is directly opposite to the liquid outlet, the cleaning liquid in the cavity 111 will be directly absorbed by the negative pressure in the liquid outlet pipe 13 through the through hole, while the remaining multiple through holes cannot effectively absorb the cleaning liquid in the cavity 111 due to insufficient negative pressure, resulting in the cleaning liquid in the cavity 111 being discharged only through the through hole directly opposite to the liquid outlet. When there is a lot of cleaning liquid in the cavity 111, it is very likely to cause blockage in the cleaning liquid discharge, thereby reducing the cleaning liquid discharge efficiency and the cleaning efficiency of the sampling needle.

[0051] In addition, some cleaning liquid will remain at the liquid outlet after being discharged. If the through hole is directly opposite to the liquid outlet, the cleaning liquid at the liquid outlet will flow back into the cavity 111 through the through hole, and there is a risk of contaminating the sampling needle.

[0052] Therefore, the present application proposes that the liquid outlet, the connection between the second annular cavity 113 and the cavity 111 and the center of the second annular cavity 113 are no longer on the same straight line. This improves the efficiency of the second annular cavity 113 and the liquid outlet tube 13 in discharging the cleaning liquid after cleaning the sampling needle in the cavity 111, improves the efficiency of the liquid inlet tube 12 and the first annular cavity 112 in injecting the cleaning liquid into the cavity 111, and the second annular cavity 113 and the liquid outlet tube 13 in absorbing the cleaning liquid from the cavity 111, further improves the cleaning efficiency of the sampling needle swab 1 for the sampling needle; and further avoids the situation where the cleaning liquid flows back into the cavity 111.

[0053] Optionally, the first annular cavity 112 and the second annular cavity 113 are concentrically arranged, and the second annular cavity 113 and the cavity body 111 are concentrically arranged. That is, the first annular cavity 112, the second annular cavity 113 and the cavity body 111 are concentrically arranged.

[0054] Through the above arrangement, it is ensured that when the cleaning liquid enters the cavity 111 through the first annular cavity 112, the flow rate of the cleaning liquid in all directions and the impact force on the sampling needle are basically the same, so as to avoid the uneven impact force of the cleaning liquid on the sampling needle, which may cause the sampling needle to be partially cleaned, thereby ensuring the cleaning efficiency of the sampling needle by the sampling needle swab 1. In addition, the negative pressure of each connection between the second annular cavity 113 and the cavity 111 is basically the same, and the cleaning liquid can evenly enter the second annular cavity 113 through each connection and be discharged through the liquid outlet pipe 13, thereby ensuring the discharge efficiency of the cleaning liquid and further improving the cleaning efficiency of the sampling needle swab 1 on the sampling needle.

[0055] Further, such as Figure 3 As shown, in the height direction of the main body 11, the liquid inlet pipe 12 is located above the first annular cavity 112, and then after the cleaning liquid is input into the first annular cavity 112 through the liquid inlet pipe 12, it will accumulate in the first annular cavity 112, ensuring the flow rate of the cleaning liquid injected into the cavity 111 from the first annular cavity 112.

[0056] And as Figure 2 As shown, the second annular cavity 113 and the liquid outlet pipe 13 are located on the same height section of the main body 11 to shorten the distance between the liquid outlet pipe 13 and the second annular cavity 113, ensure the negative pressure provided by the liquid outlet pipe 13 to the second annular cavity 113, and ensure the efficiency of the liquid outlet pipe 13 in absorbing the cleaning liquid through the second annular cavity 113.

[0057] Optionally, the diameter of the liquid inlet tube 12 is smaller than the diameter of the liquid outlet tube 13. This ensures that the discharge efficiency of the cleaning liquid in the sampling needle swab 1 is greater than or equal to the injection efficiency of the cleaning liquid, avoids the accumulation of the cleaning liquid in the cavity 111, causes the cleaning liquid to be blocked, and affects the cleaning efficiency of the sampling needle, thereby improving the practicality of the sampling needle swab 1.

[0058] Optionally, see Figure 4 and Figure 5 The main body 11 further includes at least one first through hole 114 and at least one second through hole 115 .

[0059] The first annular cavity 112 is connected to the cavity 111 through the first through hole 114 , and the second annular cavity 113 is connected to the cavity 111 through the second through hole 115 .

[0060] Moreover, the first through hole 114 is located at the upper edge of the first annular cavity 112, and when the cleaning liquid is introduced into the liquid inlet pipe 12, the cleaning liquid will not immediately enter the cavity 111 through the first annular cavity 112, but will first accumulate in the first annular cavity 112. After the cleaning liquid basically fills the first annular cavity 112, the liquid level of the cleaning liquid is higher than the lower hole edge of the first through hole 114, and the cleaning liquid is then injected into the cavity 111 through the first through hole 114 to ensure the flow rate and flow velocity of the cleaning liquid injected into the cavity 111.

[0061] If the first through hole 114 is set at the lower edge or the middle of the first annular cavity 112, after the cleaning liquid is passed into the liquid inlet pipe 12, the cleaning liquid will directly pass through the first annular cavity 112 into the cavity 111, but at this time the amount of cleaning liquid is small, and it needs to be divided into multiple first through holes 114 to enter the cavity 111, and the amount of cleaning liquid passed into each first through hole 114 is bound to be insufficient. It is impossible to effectively cause a certain impact on the sampling needle and clean the sampling needle.

[0062] At the same time, it is also convenient to process the first through hole 114. Figure 3 The main body 11 is formed by splicing three independent modules. By setting the first through hole 114 at the upper edge of the first annular cavity 112, a groove can be directly dug at the upper end of the independent module at the bottom of the main body 11, and then the independent module in the middle of the main body 11 is abutted to form the first through hole 114. There is no need to drill holes on the independent modules, which reduces the processing difficulty and improves the molding efficiency of the main body 11.

[0063] Therefore, this embodiment proposes that the first through hole 114 is arranged at the upper edge of the first annular cavity 112 to ensure the flow rate and flow velocity of the cleaning liquid injected into the cavity 111, further improve the cleaning efficiency of the sampling needle swab 1 for the sampling needle, and further reduce the overall processing difficulty of the sampling needle swab 1.

[0064] It can be understood that since the liquid outlet pipe 13 uses negative pressure to suck out the cleaning liquid through the second annular cavity 113, and there is no need to accumulate the cleaning liquid, the present application does not limit the specific position of the second through hole 115 in the second annular cavity 113. The specific position of the second through hole 115 in the second annular cavity 113 can be set by the user according to specific needs.

[0065] In one embodiment, as described above with respect to the first through hole 114 , in order to facilitate the processing of the second through hole 115 , the second through hole 115 may be disposed at the lower edge of the second annular cavity 113 , which will not be described in detail herein.

[0066] In one embodiment, the body 11 includes three first through holes 114 and three second through holes 115 .

[0067] The extension directions of two of the three first through holes 114 are parallel to each other, and the extension direction of the remaining one of the three first through holes 114 is perpendicular to the extension direction of the two of the three first through holes 114. Figure 5As shown, two of the three first through holes 114 can be connected to form the same line segment (close to the liquid inlet, hereinafter referred to as the front through hole), and the remaining first through hole 114 of the three first through holes 114 (far away from the liquid inlet, hereinafter referred to as the rear through hole) can be perpendicular to the line between the two front through holes. In the two front through holes, the extension directions of the two front through holes are parallel to each other, and the hole axes of the two front through holes are not on the same straight line with the center of the cavity 111, that is, there is no situation where the extension direction of the two front through holes is parallel to the direction in which the orifice of the front through hole points to the center of the cavity 111. Compared with the extension direction of the through hole being parallel to the direction in which the orifice of the through hole points to the center of the cavity 111, the extension directions of the two front through holes are parallel to each other, and the hole axes of the two front through holes are not on the same straight line with the center of the cavity 111, which makes the hole length of the two front through holes longer.

[0068] The extension direction of the rear through hole is perpendicular to the line connecting the two front through holes, and the distance between the rear through hole and the two front through holes is equal, that is, the extension direction of the rear through hole is parallel to the hole mouth of the rear through hole and points to the center direction of the cavity 111. Therefore, the hole length of the two front through holes is larger than that of the rear through hole, and the rear through hole is farther from the liquid inlet than the two front through holes. Through the above arrangement, it can be ensured that the length of the transmission path of the cleaning liquid injected from the liquid inlet through the front through hole to the cavity 111 is basically the same as the length of the transmission path entering the cavity 111 through the rear through hole.

[0069] It can be understood that the cleaning liquid is transmitted in the pipeline, and the length of the pipeline will affect the flow rate of the cleaning liquid. The length of the transmission path of the cleaning liquid injected from the liquid inlet through the front through hole to reach the cavity 111 is basically the same as the length of the transmission path entering the cavity 111 through the rear through hole. This ensures that the flow rate of the cleaning liquid entering the cavity 111 through the front through hole and the rear through hole is basically the same, so that the cleaning liquid can evenly clean the sampling needle in all directions, thereby improving the cleaning efficiency of the sampling needle swab 1 on the sampling needle.

[0070] In another embodiment, any two of the three second through holes 115 are equidistantly arranged on the cavity wall of the second annular cavity 113 close to the cavity body 111, and the extension direction of the second through hole 115 is the direction in which the opening of the second through hole 115 points to the center of the second annular cavity 113. According to the analysis of the three first through holes 114 in the previous text, the hole lengths of the three second through holes 115 are equal, and the three second through holes 115 are evenly distributed, ensuring that each second through hole 115 has the same absorption environment for the cleaning liquid, and the cleaning liquid can be evenly absorbed into the second annular cavity 113 through the three second through holes 115 and discharged through the liquid outlet pipe 13. This avoids the three second through holes 115 having different absorption environments for the cleaning liquid, so that the cleaning liquid is only absorbed in one or two second through holes 115, the discharge efficiency of the cleaning liquid is reduced, and the cleaning liquid is blocked in the cavity body 111, thereby improving the discharge efficiency of the cleaning liquid and the cleaning efficiency of the sampling needle.

[0071] Optionally, see Figure 2 and Figure 3 The cavity 111 includes a first cavity segment 1111, a second cavity segment 1112, a third cavity segment 1113 and a fourth cavity segment 1114 which are connected in sequence.

[0072] Among them, the first annular cavity 112 is connected to the fourth cavity section 1114, and the second annular cavity 113 is connected to the second cavity section 1112. That is, the cleaning liquid enters the fourth cavity section 1114 through the first annular cavity 112 to clean the sampling needle in the cavity 111, and the negative pressure in the second annular cavity 113 can absorb the cleaning liquid in the cavity 111, then the cleaning liquid in the fourth cavity section 1114 will enter the second cavity section 1112 through the third cavity section 1113, and then be discharged through the second annular cavity 113. In the process of the cleaning liquid being absorbed from the fourth cavity section 1114 to the second cavity section 1112, it can be understood that the cleaning liquid will clean the part of the sampling needle located in the third cavity section 1113 and the second cavity section 1112. Improve the cleaning efficiency of the sampling needle swab 1 on the sampling needle.

[0073] In one embodiment, the diameter of the first cavity section 1111 is smaller than the diameter of the second cavity section 1112, the diameter of the third cavity section 1113, and the diameter of the fourth cavity section 1114. That is, the first cavity section 1111 is the cavity section with the smallest diameter among the four cavity sections. For example, the diameter of the first cavity section 1111 can be close to the outer diameter of the sampling needle, and slightly larger than the outer diameter of the sampling needle by 0.01 to 0.1 mm, so as to allow the sampling needle to pass through the first cavity section 1111 and enter the cavity 111, while the dust in the environment will not enter the cavity 111 due to the excessively large diameter of the first cavity section 1111, thereby affecting the cleaning effect of the sampling needle.

[0074] The tube diameter of the third cavity segment 1113 is smaller than that of the second cavity segment 1112 , the tube diameter of the third cavity segment 1113 is smaller than that of the fourth cavity segment 1114 , and the tube diameter of the second cavity segment 1112 is larger than that of the fourth cavity segment 1114 .

[0075] Specifically, the diameter of the third cavity section 1113 is larger than the diameter of the first cavity section 1111, that is, the diameter of the third cavity section 1113 is larger than the outer diameter of the sampling needle, so as to allow the cleaning liquid to enter the second cavity section 1112 from the fourth cavity section 1114 through the third cavity section 1113. The diameter of the third cavity section 1113 is smaller than the diameters of the second cavity section 1112 and the fourth cavity section 1114, so as to reduce the flow space of the cleaning liquid from the fourth cavity section 1114 to the second cavity section 1112, and ensure the negative pressure in the second cavity section 1112 to absorb the cleaning liquid. In one embodiment, if the tube diameter of the third cavity section 1113 is equal to the tube diameter of the second cavity section 1112, or equal to the tube diameter of the fourth cavity section 1114, or is larger than the tube diameters of the second cavity section 1112 and the fourth cavity section 1114, that is, the flow space for the cleaning liquid to enter the second cavity section 1112 from the fourth cavity section 1114 becomes larger, then a larger negative pressure needs to be provided at the second cavity section 1112 to drive the cleaning liquid from the fourth cavity section 1114 into the second cavity section 1112, thereby reducing the efficiency of absorbing the cleaning liquid, and a larger negative pressure needs to be provided, which increases energy consumption.

[0076] Furthermore, the diameter of the fourth cavity section 1114 is smaller than the diameter of the second cavity section 1112, which can increase the distance between the needle port of the sampling needle and the liquid outlet, alleviate the impact of excessive negative pressure at the liquid outlet on the sampling needle, and facilitate the cleaning of the outer wall of the sampling needle and the draining of the cleaning liquid; it can also play a role in buffering the flow rate. When the outer wall of the sampling needle is cleaned, the inner wall of the sampling needle will also be cleaned at the same time. If there is no second cavity section 1112 with a larger diameter, the cleaning flow of the outer wall will be too large and will offset the cleaning flow of the inner wall, and the flow balance will not be achieved, which will affect the cleaning of the inner wall. Therefore, this embodiment proposes that the diameter of the second cavity section 1112 is larger than the diameter of the fourth cavity section 1114 to ensure the cleaning efficiency of the sampling needle by the sampling needle swab 1 and improve the practicality of the sampling needle swab 1.

[0077] Optionally, transitions are made by chamfering between the first cavity segment 1111 and the second cavity segment 1112, between the second cavity segment 1112 and the third cavity segment 1113, and between the third cavity segment 1113 and the fourth cavity segment 1114 to prevent the cleaning liquid from adhering to the transition areas of the cavity segments and affecting the cleaning effect of the sampling needle being cleaned in the cavity 111.

[0078] In summary, in the sampling needle swab 1 provided in the embodiment of the present application, the cavity 111 of the main body 11 allows the sampling needle to pass through, the first annular cavity 112 and the second annular cavity 113 are arranged around the cavity 111, and are connected to the cavity 111, and then the liquid inlet pipe 12 is connected to the cavity 111 through the first annular cavity 112, and the liquid outlet pipe 13 is connected to the cavity 111 through the second annular cavity 113. The cleaning liquid can enter the cavity 111 through the liquid inlet pipe 12 and the first annular cavity 112 to clean the sampling needle in the cavity 111, and because the first annular cavity 112 is arranged around the cavity 111, the uniformity of the cleaning liquid injected into the cavity 111 is guaranteed, and the cleaning liquid is ensured to contact and clean the sampling needle. Furthermore, the cleaning liquid after cleaning can be discharged through the second annular cavity 113 and the liquid outlet pipe 13, so as to keep the sampling needle in a dry state and improve the efficiency of cleaning the sampling needle.

[0079] Moreover, the connection between the liquid inlet pipe 12 and the first annular cavity 112, the connection between the first annular cavity 112 and the cavity body 111, and the center of the first annular cavity 112 are not on the same straight line, ensuring that after the liquid inlet pipe 12 injects the cleaning liquid into the first annular cavity 112, the cleaning liquid enters the cavity body 111 from the first annular cavity 112 evenly to clean the sampling needle, avoiding the situation that the cleaning liquid enters the cavity body 111 from only one place and cannot evenly contact the sampling needle, and the cleaning of the sampling needle is incomplete, further improving the cleaning efficiency of the sampling needle swab 1 on the sampling needle. At the same time, the connection between the liquid outlet pipe 13 and the second annular cavity 113, the connection between the second annular cavity 113 and the cavity body 111, and the center of the second annular cavity 113 are not on the same straight line, ensuring that when the liquid outlet pipe 13 absorbs the cleaning liquid, the pressure in the second annular cavity 113 is evenly distributed, and the cleaning liquid can be evenly sucked out of the second annular cavity 113, ensuring the discharge efficiency of the cleaning liquid in the cavity body 111, and further improving the cleaning efficiency of the sampling needle swab 1 on the sampling needle.

[0080] At the same time, by setting the tube diameters of the first cavity section 1111, the second cavity section 1112, the third cavity section 1113 and the fourth cavity section 1114, the efficiency of absorbing the cleaning liquid in the cavity 111 is improved, and the cleaning efficiency of the sampling needle swab 1 on the sampling needle is further improved.

[0081] The present application also provides a cleaning component (not shown), which includes a sampling needle swab 1, a cleaning liquid supply unit and an air pump unit. The cleaning liquid supply unit is connected to the liquid inlet pipe 12 of the sampling needle swab 1, and the air pump unit is connected to the liquid outlet pipe 13 of the sampling needle swab 1. Then, the cleaning liquid supply unit supplies cleaning liquid to the cavity 111 of the sampling needle swab 1 through the liquid inlet pipe 12 to clean the sampling needle located in the cavity 111. The air pump unit generates negative pressure at the liquid outlet pipe 13 so that the cleaning liquid after cleaning the sampling needle is discharged from the cavity 111 through the liquid outlet pipe 13, thereby ensuring the dryness of the sampling needle after cleaning and improving the cleaning efficiency of the sampling needle.

[0082] This application also provides an analyzer, see Figure 6 , Figure 6 1 is a schematic diagram of the structure of the first embodiment of the analyzer provided by the present application. The analyzer A comprises a cleaning assembly, a sampling needle 2 and a driving assembly (not shown), wherein the driving assembly is connected to the sampling needle 2 and is used to drive the sampling needle 2 to move to the sample tube for sampling, or to move to the sampling needle swab 1 of the cleaning assembly for cleaning.

[0083] The above description is only an implementation method of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A sampling needle swab, characterized in that: Applicable to cleaning a sampling needle, the sampling needle swab comprises: A main body, provided with a cavity, a first annular cavity and a second annular cavity, wherein the cavity is arranged to penetrate along the axial direction of the main body to allow the sampling needle to pass through the cavity, the first annular cavity and the second annular cavity are arranged around the cavity, and the first annular cavity and the second annular cavity are both connected to the cavity; A liquid inlet pipe and a liquid outlet pipe are both arranged on the main body, and the liquid inlet pipe and the liquid outlet pipe are located on the same height section of the main body; the liquid inlet pipe is connected with the cavity through the first annular cavity, and the liquid outlet pipe is connected with the cavity through the second annular cavity; Wherein, the connection between the liquid inlet pipe and the first annular cavity, the connection between the first annular cavity and the cavity body and the center of the first annular cavity are not on the same straight line; The connection point between the liquid outlet pipe and the second annular cavity, the connection point between the second annular cavity and the cavity body, and the center of the second annular cavity are not on the same straight line.

2. The sampling needle swab according to claim 1, characterized in that: The first annular cavity is concentrically arranged with the second annular cavity, and the first annular cavity is concentrically arranged with the cavity body; In the height direction of the main body, the liquid inlet pipe is located above the first annular cavity; The second annular cavity and the liquid outlet pipe are located on the same height section of the main body.

3. The sampling needle swab according to claim 1, characterized in that: The diameter of the liquid inlet pipe is smaller than the diameter of the liquid outlet pipe.

4. The sampling needle swab according to claim 1, characterized in that: The main body further comprises at least one first through hole and at least one second through hole, the first annular cavity is connected to the cavity through the first through hole, and the second annular cavity is connected to the cavity through the second through hole. Wherein, the first through hole is located at the upper edge of the first annular cavity.

5. The sampling needle swab according to claim 4, characterized in that: The main body comprises three first through holes and three second through holes, The extension directions of two of the three first through holes are parallel to each other, and the hole axes of the two of the three first through holes are not in the same straight line with the center of the first annular cavity, and the extension direction of the remaining one of the three first through holes is perpendicular to the extension direction of the two of the three first through holes, and the remaining one of the three first through holes is equidistant from the two of the three first through holes; Any two of the three second through holes are equidistantly arranged on the cavity wall of the second annular cavity close to the cavity body, and the extension direction of the second through hole is the direction in which the opening of the second through hole points to the center of the second annular cavity.

6. The sampling needle swab according to claim 1, characterized in that: The cavity comprises a first cavity section, a second cavity section, a third cavity section and a fourth cavity section connected in sequence, The first annular cavity is communicated with the fourth cavity segment, and the second annular cavity is communicated with the second cavity segment.

7. The sampling needle swab according to claim 6, characterized in that: The diameter of the first cavity section is smaller than the diameter of the second cavity section, the diameter of the third cavity section, and the diameter of the fourth cavity section; The diameter of the third cavity section is smaller than the diameter of the second cavity section, and the diameter of the third cavity section is smaller than the diameter of the fourth cavity section; The diameter of the second cavity section is greater than the diameter of the fourth cavity section.

8. The sampling needle swab according to claim 6, characterized in that: The first cavity segment and the second cavity segment, the second cavity segment and the third cavity segment, and the third cavity segment and the fourth cavity segment are transitioned by chamfers.

9. A cleaning component, characterized in that: The cleaning component includes the sampling needle swab as described in any one of claims 1 to 8, a cleaning liquid supply unit and an air pump unit, the cleaning liquid supply unit is connected to the liquid inlet tube of the sampling needle swab, the air pump unit is connected to the liquid outlet tube of the sampling needle swab, the cleaning liquid supply unit supplies cleaning liquid to the cavity of the sampling needle swab through the liquid inlet tube to clean the sampling needle located in the cavity, and the air pump unit generates negative pressure at the liquid outlet tube to discharge the cleaning liquid after cleaning the sampling needle from the cavity through the liquid outlet tube.

10. An analyzer, characterized in that: It comprises the cleaning component as described in claim 9, a sampling needle and a driving component, wherein the driving component is connected to the sampling needle and is used to drive the sampling needle to move into a sample tube for sampling, or to move into a sampling needle swab of the cleaning component for cleaning.

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